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3 years ago

The sum of two numbers is 19 and there difference is 7 what are the two numbers

Mathematics

2 answers:

Zielflug [23.3K]3 years ago

5 0

Answer:

The two numbers are 13 and 6.

Step-by-step explanation:

x+y=19

x-y=7

-----------

2x=26

x=26/2

x=13

13+y=19

y=19-13

y=6

x=13, y=6.

Rzqust [24]3 years ago

4 0

Answer:14 and 5

Step-by-step explanation:

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2 years ago

An analyst from an energy research institute in California wishes to precisely estimate a 99% confidence interval of the average

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Answer:

190

Step-by-step explanation:

Data provided in the question:

Confidence level = 99%

Therefore,

α = 1% = 0.01

[ from standard normal table ]

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3 years ago

Scott likes to run long distances. He can run 20 \text{ km}20 km20, start text, space, k, m, end text in 858585 minutes. He want

aleksandrvk [35]

Answer:

<em>Scott will take 221 minutes to run 52 km</em>

Step-by-step explanation:

<u>Speed</u>

The speed of an object can be calculated with the formula:

$\displaystyle v=\frac{d}{t}$

Where d is the distance traveled and t is the time taken.

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$\displaystyle t=\frac{d}{v}$

Since the speed has been already determined:

$\displaystyle t=\frac{52}{\frac{20}{85}}$

Multiplying by the reciprocal of the denominator:

$\displaystyle t=52*\frac{85}{20}$

t = 221 min

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